/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: ExtendedType.java,v 1.2.4.1 2005/09/15 08:15:06 suresh_emailid Exp $
 */
package com.sun.org.apache.xml.internal.dtm.ref;

/**
 * The class ExtendedType represents an extended type object used by
 * ExpandedNameTable.
 */
public final class ExtendedType {

  private int nodetype;
  private String namespace;
  private String localName;
  private int hash;

  /**
   * Create an ExtendedType object from node type, namespace and local name.
   * The hash code is calculated from the node type, namespace and local name.
   *
   * @param nodetype Type of the node
   * @param namespace Namespace of the node
   * @param localName Local name of the node
   */
  public ExtendedType(int nodetype, String namespace, String localName) {
    this.nodetype = nodetype;
    this.namespace = namespace;
    this.localName = localName;
    this.hash = nodetype + namespace.hashCode() + localName.hashCode();
  }

  /**
   * Create an ExtendedType object from node type, namespace, local name
   * and a given hash code.
   *
   * @param nodetype Type of the node
   * @param namespace Namespace of the node
   * @param localName Local name of the node
   * @param hash The given hash code
   */
  public ExtendedType(int nodetype, String namespace, String localName, int hash) {
    this.nodetype = nodetype;
    this.namespace = namespace;
    this.localName = localName;
    this.hash = hash;
  }

  /**
   * Redefine this ExtendedType object to represent a different extended type.
   * This is intended to be used ONLY on the hashET object. Using it elsewhere
   * will mess up existing hashtable entries!
   */
  protected void redefine(int nodetype, String namespace, String localName) {
    this.nodetype = nodetype;
    this.namespace = namespace;
    this.localName = localName;
    this.hash = nodetype + namespace.hashCode() + localName.hashCode();
  }

  /**
   * Redefine this ExtendedType object to represent a different extended type.
   * This is intended to be used ONLY on the hashET object. Using it elsewhere
   * will mess up existing hashtable entries!
   */
  protected void redefine(int nodetype, String namespace, String localName, int hash) {
    this.nodetype = nodetype;
    this.namespace = namespace;
    this.localName = localName;
    this.hash = hash;
  }

  /**
   * Override the hashCode() method in the Object class
   */
  public int hashCode() {
    return hash;
  }

  /**
   * Test if this ExtendedType object is equal to the given ExtendedType.
   *
   * @param other The other ExtendedType object to test for equality
   * @return true if the two ExtendedType objects are equal.
   */
  public boolean equals(ExtendedType other) {
    try {
      return other.nodetype == this.nodetype &&
          other.localName.equals(this.localName) &&
          other.namespace.equals(this.namespace);
    } catch (NullPointerException e) {
      return false;
    }
  }

  /**
   * Return the node type
   */
  public int getNodeType() {
    return nodetype;
  }

  /**
   * Return the local name
   */
  public String getLocalName() {
    return localName;
  }

  /**
   * Return the namespace
   */
  public String getNamespace() {
    return namespace;
  }

}
